A park named after late Beastie Boys member Adam Yauch was defaced with swastikas and pro-Trump graffiti. So the band asked fans to "rally to stand against hate" at the park in Brooklyn today and hundreds of New Yorkers showed up.

I'm assuming that we're all here today 'cause we're thinking the same thing: spray-painting swastikas at a children's playground is a messed up thing to do … This is about hate crimes towards Muslims soaring to their highest levels since 9/11. We elected a president that is giving our children the message that it's OK to attack people of color. This is real. We've gotta stand up against hate. If you're able to give money, give to Black Lives Matter. If you're able to protest, protest. If you're able to volunteer, volunteer.

If you're a musician, write that anthem. Take what you're good at and give to the cause that you care most about. And please keep your eyes open. Stand up for each other. I reject Donald Trump's mission of America. Brooklyn, Bronx, Queens and Staten, from the Battery to the top of Manhattan. Black, white, New York, let's make it happen!